US5538395A - Thermoplastic pump rotor - Google Patents

Thermoplastic pump rotor Download PDF

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Publication number
US5538395A
US5538395A US08/217,503 US21750394A US5538395A US 5538395 A US5538395 A US 5538395A US 21750394 A US21750394 A US 21750394A US 5538395 A US5538395 A US 5538395A
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United States
Prior art keywords
cover
blades
pump rotor
balancing
molded
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Expired - Fee Related
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US08/217,503
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English (en)
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Daniel Hager
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Ozen SA
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Ozen SA
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F04D29/2227—Construction and assembly for special materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • B29C45/376—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/301—Three-dimensional joints, i.e. the joined area being substantially non-flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0005—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fibre reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/2701—Details not specific to hot or cold runner channels
    • B29C45/2708—Gates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
    • B29L2031/087—Propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/748—Machines or parts thereof not otherwise provided for
    • B29L2031/7496—Pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/603—Composites; e.g. fibre-reinforced

Definitions

  • the present invention relates to pump rotors including walls of relatively small thickness and made of injected thermoplastic material for the displacement of different fluids (oils, greases, hydrocarbons, air, and the like).
  • the present invention also relates to a process of manufacturing the pump rotors described above.
  • the object of the present invention is to overcome the above-mentioned drawbacks by providing pump rotors made of two parts which are assembled by welding, both parts being obtained by injection molding from suitable thermoplastic materials, preferably filled materials.
  • the walls of the molded parts are sufficiently thin to replace similar parts made of metal and are formed to provide maximum benefit of the skin effect resulting from the molding of the surface finish of the material used to form the walls of small thickness.
  • the types of materials preferred for the production of these two parts are polyamides (6,6 or 6,10 or 6,4 or 11,12), polyarylamides, polyetherketones, polyphenylene sulfides, polypropylenes and polyphthalamides, preferably reinforced with between 10% and 60% by weight of glass fibers, Kevlar fibers or carbon fibers, without this enumeration being limitative.
  • the wall thicknesses that are obtained are about one millimeter or less.
  • these two parts may be advantageously effected in accordance with the present invention by multiple injection points, distributed uniformly over the periphery of a central hub.
  • the ports are sufficient in number so that the paths of the material are rather short up to the lines where the layers join each other.
  • the two parts can be injected through a diffusion layer created by a flow striction zone around a central ring formed on each part, the flow striction zone being normally fed with material at one or more points.
  • the two parts thus obtained are assembled by ultrasonic welding.
  • energy directors in the form of triangular beads are provided so as to terminate on the upper edges of the blades of the bottom part to facilitate the ultrasonic welding.
  • the two molded parts are advantageously provided with a balancing weight which is integrally molded with the two parts.
  • the angular position and the mass of the balancing weight can be adjusted as desired by an adjustable device provided on production molds. This feature completely eliminates the problem of individual balancing of the rotors, which problem is present in the prior technologies.
  • the rotors in accordance with the present invention can have at a central part thereof a drive system which can be formed on one of the two parts during the molding process, or be metallic and attached to the one of the two parts.
  • the two component parts of the rotors in accordance with the invention be formed of two different materials, provided that these materials are compatible for assembly by ultrasonic welding.
  • FIG. 1a is a top view of a pump rotor according to the present invention.
  • FIG. 1b is a sectional view through an assembled pump rotor in accordance with the present invention.
  • FIG. 2a is a sectional view through a first embodiment of a bottom part of the pump rotor including a plurality of blades;
  • FIG. 2b is a sectional view through a cover formed to be received on the bottom part shown in FIG. 2a;
  • FIG. 3a is a sectional view of a second embodiment of a bottom part of the pump rotor
  • FIG. 3b is a sectional view through a cover formed to be received on the bottom part shown in FIG. 3a;
  • FIG. 4a is a diagrammatic view of a bottom part and a cover before their assembly by ultrasonic welding
  • FIG. 4b is an illustration of an energy director, for the ultrasonic welding
  • FIG. 4c is a perspective view of a blade provided with the energy director of FIG. 4b;
  • FIG. 5 is a diagrammatic view of an ultrasonic welding device
  • FIG. 6 is a diagrammatic view of a variant assembly used for ultrasonic welding
  • FIG. 7 is a sectional view through a mold for a bottom part including a balancing weight.
  • a pump rotor in accordance with the invention is formed of two assembled parts, namely a bottom 1 and a cover 2, which are shown in detailed cross section in FIG. 1b.
  • a bottom 1 and a cover 2 Two other embodiments are shown in FIGS. 2a and 2b and in FIGS. 3a and 3b, respectively.
  • the bottom 1 comprises a disk 10 on top of which there is a series of blades 11 which are integrally formed with the disk.
  • the shape of the disk may, for instance, be curved or helicoidal in accordance with the requirements, in order to improve or optimize the efficiency of the rotor, particularly as a function of the nature of the fluid to be propelled.
  • the disk 10 may advantageously be provided on its periphery and in its plane with a narrow annular ring 12 projecting from the blades 11 in order to permit the use of an annular ejector 110 shown in FIG. 7.
  • the annular ejector 110 facilitates the extraction of the part from its cavity at the end of the molding process without interfering with the rotation of the part resulting from the axial displacement converted into rotation as a result of the shape of the blades 11.
  • the bottom 1 is also provided in its center, in conventional manner, with a hub 13 which can advantageously be provided with a drive system of known type such as, for instance, a threaded region or a keying or a polygon or the like, obtained directly upon molding, or else a part, of metal or the like, inserted, surmounted or attached in accordance with the known techniques.
  • a drive system of known type such as, for instance, a threaded region or a keying or a polygon or the like, obtained directly upon molding, or else a part, of metal or the like, inserted, surmounted or attached in accordance with the known techniques.
  • FIG. 2b shows the cover 2, which is the part complementary to the bottom 1.
  • the cover 2 includes a thin circular disk 20 having the general shape of a cap generated by revolution around a vertical axis is such that it substantially corresponds to the curvature of the upper edges 14 of the blades 11 of the bottom 1.
  • the outside diameter 21 of the cover 2 coincides substantially with that defined on the disk 10 of the bottom 1 by the outer edges 15 of the blades 11, while its inside diameter 22 coincides substantially with that defined in the same manner by the inner edges 16 of these same blades 11.
  • FIGS. 2a and 2b as well as in FIGS. 3a and 3b which show a variant embodiment of these two same constituent parts of a pump rotor in accordance with the invention, these two parts are obtained by injection molding with precision molds of a thermoplastic material of high mechanical strength and of great fluidity so that the parts can be injected to have walls of slight thicknesses, that is to say on the order of a millimeter or less.
  • the material used must retain its mechanical properties at high temperature and, if possible, have a chemical resistance which is adapted to the fluid to be propelled by the pump or to its environment (oils, greases of the mechanical system, hydrocarbons, and the like).
  • a material selected from the following list is preferably used, this list being given by way of illustration but not exhaustively or by way of limitation:
  • a material that is preferred is filled with between 10% and 60% or more by weight of glass fibers or Kevlar fibers or else with carbon fibers, or else other fillers of this type which are well known in the art of injectable filled thermoplastic materials.
  • the injection of the bottom 1 and the cover 2 will be effected in a conventional manner through a channel 3 coaxial with the circular parts and feeding the cavity in question in such a manner as to assume a symmetrical, radial flow of the injected material.
  • This injection can be effected, as is illustrated in FIGS. 2a and 2b, through multiple injection points such as 17, distributed in sufficient number over the periphery 13 of the bottom 1 or over the inner ring 22 of the cover 2, in such a manner that the paths of the material are relatively short up to the lines where the layers join each other, thus assuring a welding with material which is still hot and therefore has good mechanical properties.
  • vents will be provided at the each of the weld lines to avoid the phenomenon of overheating at the exact location where the air and the gases contained in the cavity must be evacuated.
  • this injection can also be effected, as shown in FIGS. 3a and 3b, through a diffusion layer of the material, created by a flow striction zone (18 or 28) around a central ring of the part (19 or 29), which ring is itself fed by one or more injection points in a conventional manner.
  • vents will, of course, be provided at suitable places in order to permit the evacuation of the air and gases from the cavity and avoid local overheating, as is well known in the art of injection molding.
  • a bead of triangular section will be arranged on the upper edge 14 of each blade 11 in order to come in contact with the cover 2 flat and along its curvature, as is well known in the art of ultrasonic welding.
  • the bead of triangular section on the upper edge 14 of each blade 11 disappears and is not present in the completed rotor with the bottom welded to the cover.
  • This simple arrangement which is possible due to the slight wall thicknesses used and the conformability thus obtained for the cover 2, avoids the use of more traditional known methods such as nesting, which are much more difficult to carry out.
  • the centering of the cover 2 on the bottom 1 will be effected during assembly by welding in accordance with the customary methods.
  • centering is performed by positioning imposed by the support of each part in the sonotrode 30 and in the anvil 31 as shown diagrammatically in FIG. 5, or else by a relative positioning of the two parts controlled by nestings in reduced number formed on the two parts, such as the centering parts 4 shown diagrammatically in FIG. 6.
  • a balancing weight 5 shown in FIG. 7 is formed on each of the bottom 1 and the cover 2 during molding.
  • FIG. 7 shows the injection mold for the bottom 1 including the blades 11. It should be understood that the principle which is described here for the molding of the bottom 1 is applicable in its entirety in the same way to the molding of the cover 2.
  • the upper part 101 of this mold has a movable ring 102 which can turn around the central axis 103 of the part and of the mold, being guided with respect to the fixed part of the mold by, for instance, rollers.
  • the movable ring 102 is equipped with a peripheral tooth 104 which meshes with a corresponding suitable worm 105 arranged in the fixed part of the upper half mold 101.
  • FIG. 2a shows a respective balancing weight 5 on the base and FIG. 2b shows it on the cover.
  • FIG. 7 shows that the weight 5 is a small diameter circular disk out toward the periphery of the bottom or the cover, and this is depicted in FIGS. 2a and 2b.
  • the movable ring 102 In a suitable region of its periphery, the movable ring 102, the lower part 106 of which forms the mold cavity for the outer ring of the lower face of the disk 10 of the bottom 1, bears a cap 107 which is displaceable vertically along an axis parallel to the principal axis 103, practically without appreciable play, in a corresponding borehole 108 in the ring 102.
  • This cap 107 is screwed on a threaded rod 109 integral with the ring 102 emerging into the borehole 108.
  • the lower face of the cap 107 bears a screwdriver notch or a spur or the like, making it possible to turn it as desired with a suitable tool when the mold is open, and thus to modify its height with respect to the plane of the lower part 106 of the ring 102, forming the lower face of the outer ring of the mold cavity of the bottom 1.
  • a weight 5 can be formed on the lower face of the disk 10 of the bottom 1 or on the upper face of the cover 2.
  • the height of the weight 5, and therefore the mass can be modified by changing the vertical position of the cap 107 with respect to the lower plane 106 of the ring 102.
  • the angular position of the weight 5 can be modified by moving the worm 105 which turns the movable ring 102 therefore the axis bearing the rod 109 to the end of which the cap 107 is fastened.
  • pump rotors thus described can obviously give rise to numerous variants in execution without going beyond the scope of the present invention.
  • the two component parts namely the bottom 1 and the cover 2
  • the general shape and number of blades 11 integral with the bottom 1 can be extremely variable, depending on the type of application contemplated, in particular the nature of the fluid to be propelled and the pressure head to be obtained.
  • the shape and the position, on each of the two component parts, of the balancing weight 5 formed during molding can be modified to a large extent without going beyond the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rotary Pumps (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US08/217,503 1993-03-25 1994-03-24 Thermoplastic pump rotor Expired - Fee Related US5538395A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9303640A FR2703111B1 (fr) 1993-03-25 1993-03-25 Rotor pour pompe comportant deux pieces assemblees par soudure, obtenues par moulage par injection de materiaux thermoplastiques, et procede de fabrication d'un tel rotor .
FR9303640 1993-03-25

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US5538395A true US5538395A (en) 1996-07-23

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US08/217,503 Expired - Fee Related US5538395A (en) 1993-03-25 1994-03-24 Thermoplastic pump rotor

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US (1) US5538395A (it)
DE (1) DE4409629A1 (it)
FR (1) FR2703111B1 (it)
IT (1) IT1273079B (it)

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US5775878A (en) * 1995-08-30 1998-07-07 Societe Europeene De Propulsion Turbine of thermostructural composite material, in particular of small diameter, and a method of manufacturing it
US5951255A (en) * 1997-03-05 1999-09-14 Deutsches Zentrum Fur Luft-Und Raumfahrt Ev Device for forwarding a medium
US6033183A (en) * 1997-01-16 2000-03-07 Wilo Gmbh Impeller for a rotary pump
US6264430B1 (en) * 1997-01-17 2001-07-24 Abb Flakt Oy Evaporating fan and its blade wheel
US6340288B1 (en) 1997-01-17 2002-01-22 Abb Flakt Oy High-pressure fan
US20030152458A1 (en) * 2002-02-08 2003-08-14 Kioritz Corporation Set of split body for forming blower fan through hollow-article injection molding process
WO2003073729A1 (de) * 2002-02-21 2003-09-04 Siemens Aktiengesellschaft Gehäuse oder gehäuseteil sowie herstellungsverfahren für ein gehäuse oder gehäuseteil, sowie werkzeug zum durchführen dieses verfahrens
US6841112B1 (en) 2001-04-11 2005-01-11 Comair Rotron, Inc. Balanced rotor
EP1527867A1 (de) * 2003-10-28 2005-05-04 Behr GmbH & Co. KG Verfahren zur Herstellung eines Lüfterrades sowie nach diesem Verfahren hergestelltes Lüfterrad
EP1533104A3 (de) * 2003-11-21 2006-12-20 Siemens Aktiengesellschaft Verfahren zur Herstellung eines Laufrades für eine Kreiselpumpe
US20080199319A1 (en) * 2005-07-06 2008-08-21 Schaeffler Kg Water Pump Impeller
US20100189568A1 (en) * 2009-01-27 2010-07-29 Yujiro Watanabe Manufacturing method of impeller
CN101846096A (zh) * 2009-03-27 2010-09-29 株式会社山田制作所 封闭式叶轮的制造方法
US20100316498A1 (en) * 2008-02-22 2010-12-16 Horton, Inc. Fan manufacturing and assembly
US20110182736A1 (en) * 2010-01-25 2011-07-28 Larry David Wydra Impeller Assembly
US20110223007A1 (en) * 2010-03-15 2011-09-15 Hammel Christian Radial fan wheel arrangement
CN102459915A (zh) * 2009-05-08 2012-05-16 诺沃皮尼奥内有限公司 复合材料护罩和用于将该护罩附连到多个叶片上的方法
US20120213632A1 (en) * 2010-08-17 2012-08-23 Mpc Inc. Non-Metallic Vertical Turbine Pump
US20120251311A1 (en) * 2009-12-16 2012-10-04 Matthias Fischer Fuel pump
CN103143900A (zh) * 2013-04-02 2013-06-12 哈尔滨电机厂有限责任公司 立轴单级单吸离心式大型水泵泵轮的焊接制造工艺方法
US20140123491A1 (en) * 2012-11-07 2014-05-08 Asia Vital Components Co., Ltd. Fan impeller balance calibrating method
JP2015124895A (ja) * 2013-12-25 2015-07-06 株式会社ノーリツ 給湯装置
US9086075B2 (en) 2011-07-07 2015-07-21 Pentair Water Pool And Spa, Inc. Impeller assembly and method
JP2015158285A (ja) * 2014-02-21 2015-09-03 株式会社ノーリツ 給湯装置
JP2015158165A (ja) * 2014-02-24 2015-09-03 株式会社ノーリツ ファンおよびそれを備える給湯装置
JP2015203537A (ja) * 2014-04-15 2015-11-16 株式会社ノーリツ 給湯装置
JP2016031017A (ja) * 2014-07-25 2016-03-07 株式会社ノーリツ 羽根車および給湯装置
JP2016044622A (ja) * 2014-08-25 2016-04-04 株式会社ノーリツ 羽根車、羽根車の製造方法および給湯装置
US20160115967A1 (en) * 2013-06-14 2016-04-28 Mitsubishi Electric Corporation Centrifugal fan, air-conditioning apparatus, and method of manufacturing centrifugal fan
US9513030B2 (en) 2013-12-25 2016-12-06 Noritz Corporation Water heater
US9797255B2 (en) 2011-12-14 2017-10-24 Nuovo Pignone S.P.A. Rotary machine including a machine rotor with a composite impeller portion and a metal shaft portion
US20170370373A1 (en) * 2016-06-28 2017-12-28 Bühler Motor GmbH Method of making a centrifugal pump impeller
US9933185B2 (en) 2014-02-24 2018-04-03 Noritz Corporation Fan and water heater provided with the same, and impeller and water heater provided with the same
EP2977186B1 (en) 2014-07-18 2018-06-20 Airbus Operations GmbH Method for sealing the edges of composite carbon fibre components
US10291091B2 (en) 2014-09-25 2019-05-14 Magna Powertrain Fpc Limited Partnership Electric fluid pump with improved rotor unit, rotor unit therefor and methods of construction thereof
US11162505B2 (en) 2013-12-17 2021-11-02 Nuovo Pignone Srl Impeller with protection elements and centrifugal compressor
US20230287885A1 (en) * 2020-11-11 2023-09-14 Server Products, Inc. Flexible impeller pump for flowable food product

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US5775878A (en) * 1995-08-30 1998-07-07 Societe Europeene De Propulsion Turbine of thermostructural composite material, in particular of small diameter, and a method of manufacturing it
US6029347A (en) * 1995-08-30 2000-02-29 Societe Europenne De Propulsion Method of manufacturing a turbine of thermostructural composite material, in particular of small diameter
GB2319497A (en) * 1996-11-21 1998-05-27 Daewoo Electronics Co Ltd Apparatus and method for friction welding an impeller of a pump
US5960543A (en) * 1996-11-21 1999-10-05 Daewoo Electronics Co., Ltd. Method for manufacturing an impeller of a pump
US6033183A (en) * 1997-01-16 2000-03-07 Wilo Gmbh Impeller for a rotary pump
US6264430B1 (en) * 1997-01-17 2001-07-24 Abb Flakt Oy Evaporating fan and its blade wheel
US6340288B1 (en) 1997-01-17 2002-01-22 Abb Flakt Oy High-pressure fan
US5951255A (en) * 1997-03-05 1999-09-14 Deutsches Zentrum Fur Luft-Und Raumfahrt Ev Device for forwarding a medium
US6841112B1 (en) 2001-04-11 2005-01-11 Comair Rotron, Inc. Balanced rotor
US20030152458A1 (en) * 2002-02-08 2003-08-14 Kioritz Corporation Set of split body for forming blower fan through hollow-article injection molding process
US6805531B2 (en) * 2002-02-08 2004-10-19 Kioritz Corporation Set of split bodies for forming blower fan through hollow-article injection molding process
WO2003073729A1 (de) * 2002-02-21 2003-09-04 Siemens Aktiengesellschaft Gehäuse oder gehäuseteil sowie herstellungsverfahren für ein gehäuse oder gehäuseteil, sowie werkzeug zum durchführen dieses verfahrens
US20050089159A1 (en) * 2002-02-21 2005-04-28 Cornelia Schrack Housing or housing part and method for producing a housing or housing part, and tool for carrying out said method
US7192253B2 (en) 2003-10-28 2007-03-20 Behr Gmbh & Co. Kg Method for producing a fan wheel and fan wheel produced by this method
EP1527867A1 (de) * 2003-10-28 2005-05-04 Behr GmbH & Co. KG Verfahren zur Herstellung eines Lüfterrades sowie nach diesem Verfahren hergestelltes Lüfterrad
US20050123712A1 (en) * 2003-10-28 2005-06-09 Behr Gmbh & Co. Kg Method for producing a fan wheel and fan wheel produced by this method
EP1533104A3 (de) * 2003-11-21 2006-12-20 Siemens Aktiengesellschaft Verfahren zur Herstellung eines Laufrades für eine Kreiselpumpe
US20080199319A1 (en) * 2005-07-06 2008-08-21 Schaeffler Kg Water Pump Impeller
CN101208522B (zh) * 2005-07-06 2010-06-16 谢夫勒两合公司 水泵叶轮及其制造方法
US20100316498A1 (en) * 2008-02-22 2010-12-16 Horton, Inc. Fan manufacturing and assembly
US20100329871A1 (en) * 2008-02-22 2010-12-30 Horton, Inc. Hybrid flow fan apparatus
US8435005B2 (en) * 2009-01-27 2013-05-07 Mitsubishi Heavy Industries, Ltd. Manufacturing method of impeller
US20100189568A1 (en) * 2009-01-27 2010-07-29 Yujiro Watanabe Manufacturing method of impeller
EP2236836A2 (en) 2009-03-27 2010-10-06 Yamada Manufacturing Co., Ltd. Method for manufacturing closed impeller
US20100242280A1 (en) * 2009-03-27 2010-09-30 Yamada Manufacturing Co., Ltd. Method for manufacturing closed impeller
EP2236836A3 (en) * 2009-03-27 2012-02-01 Yamada Manufacturing Co., Ltd. Method for manufacturing closed impeller
US8793872B2 (en) * 2009-03-27 2014-08-05 Yamada Manufacturing Co., Ltd. Method for manufacturing closed impeller
CN101846096A (zh) * 2009-03-27 2010-09-29 株式会社山田制作所 封闭式叶轮的制造方法
CN101846096B (zh) * 2009-03-27 2014-06-11 株式会社山田制作所 封闭式叶轮的制造方法
US9810230B2 (en) 2009-05-08 2017-11-07 Nuovo Pignone Srl Impeller for a turbomachine and method for attaching a shroud to an impeller
US8998581B2 (en) * 2009-05-08 2015-04-07 Nuovo Pignone S.P.A. Composite shroud and methods for attaching the shroud to plural blades
CN102459915A (zh) * 2009-05-08 2012-05-16 诺沃皮尼奥内有限公司 复合材料护罩和用于将该护罩附连到多个叶片上的方法
US20120141261A1 (en) * 2009-05-08 2012-06-07 Iacopo Giovannetti Composite shroud and methods for attaching the shroud to plural blades
US20120251311A1 (en) * 2009-12-16 2012-10-04 Matthias Fischer Fuel pump
US20110182736A1 (en) * 2010-01-25 2011-07-28 Larry David Wydra Impeller Assembly
US8807949B2 (en) * 2010-03-15 2014-08-19 Emb-Papst Mulfingen Gmbh & Co. Kg Radial fan wheel arrangement
US20110223007A1 (en) * 2010-03-15 2011-09-15 Hammel Christian Radial fan wheel arrangement
US10309231B2 (en) 2010-08-17 2019-06-04 Ceco Environmental Ip Inc. Non-metallic vertical turbine pump
US20120213632A1 (en) * 2010-08-17 2012-08-23 Mpc Inc. Non-Metallic Vertical Turbine Pump
US9347456B2 (en) * 2010-08-17 2016-05-24 Mpc, Inc. Non-metallic vertical turbine pump
US9086075B2 (en) 2011-07-07 2015-07-21 Pentair Water Pool And Spa, Inc. Impeller assembly and method
US9797255B2 (en) 2011-12-14 2017-10-24 Nuovo Pignone S.P.A. Rotary machine including a machine rotor with a composite impeller portion and a metal shaft portion
US20140123491A1 (en) * 2012-11-07 2014-05-08 Asia Vital Components Co., Ltd. Fan impeller balance calibrating method
CN103143900A (zh) * 2013-04-02 2013-06-12 哈尔滨电机厂有限责任公司 立轴单级单吸离心式大型水泵泵轮的焊接制造工艺方法
CN103143900B (zh) * 2013-04-02 2015-06-24 哈尔滨电机厂有限责任公司 立轴单级单吸离心式大型水泵泵轮的焊接制造工艺
US10309412B2 (en) * 2013-06-14 2019-06-04 Mitsubishi Electric Corporation Centrifugal fan, air-conditioning apparatus, and method of manufacturing centrifugal fan
US20160115967A1 (en) * 2013-06-14 2016-04-28 Mitsubishi Electric Corporation Centrifugal fan, air-conditioning apparatus, and method of manufacturing centrifugal fan
US11162505B2 (en) 2013-12-17 2021-11-02 Nuovo Pignone Srl Impeller with protection elements and centrifugal compressor
JP2015124895A (ja) * 2013-12-25 2015-07-06 株式会社ノーリツ 給湯装置
US9513030B2 (en) 2013-12-25 2016-12-06 Noritz Corporation Water heater
US10072842B2 (en) 2014-02-21 2018-09-11 Noritz Corporation Water heater
JP2015158285A (ja) * 2014-02-21 2015-09-03 株式会社ノーリツ 給湯装置
US10473360B2 (en) 2014-02-24 2019-11-12 Noritz Corporation Fan and water heater provided with the same, and impeller and water heater provided with the same
JP2015158165A (ja) * 2014-02-24 2015-09-03 株式会社ノーリツ ファンおよびそれを備える給湯装置
US9933185B2 (en) 2014-02-24 2018-04-03 Noritz Corporation Fan and water heater provided with the same, and impeller and water heater provided with the same
US10473359B2 (en) 2014-02-24 2019-11-12 Noritz Corporation Fan and water heater provided with the same, and impeller and water heater provided with the same
JP2015203537A (ja) * 2014-04-15 2015-11-16 株式会社ノーリツ 給湯装置
EP2977186B1 (en) 2014-07-18 2018-06-20 Airbus Operations GmbH Method for sealing the edges of composite carbon fibre components
US11214011B2 (en) 2014-07-18 2022-01-04 Airbus Operations Gmbh Method and sealing device for sealing the edges of composite fiber components
US10647063B2 (en) 2014-07-18 2020-05-12 Airbus Operations Gmbh Method and sealing device for sealing the edges of composite fiber components
JP2016031017A (ja) * 2014-07-25 2016-03-07 株式会社ノーリツ 羽根車および給湯装置
JP2016044622A (ja) * 2014-08-25 2016-04-04 株式会社ノーリツ 羽根車、羽根車の製造方法および給湯装置
US10291091B2 (en) 2014-09-25 2019-05-14 Magna Powertrain Fpc Limited Partnership Electric fluid pump with improved rotor unit, rotor unit therefor and methods of construction thereof
US10823187B2 (en) * 2016-06-28 2020-11-03 Bühler Motor GmbH Method of making a centrifugal pump impeller
US20170370373A1 (en) * 2016-06-28 2017-12-28 Bühler Motor GmbH Method of making a centrifugal pump impeller
US20230287885A1 (en) * 2020-11-11 2023-09-14 Server Products, Inc. Flexible impeller pump for flowable food product
US11852138B2 (en) * 2020-11-11 2023-12-26 Server Products, Inc. Flexible impeller pump for flowable food product

Also Published As

Publication number Publication date
DE4409629A1 (de) 1994-09-29
ITTO940219A0 (it) 1994-03-24
FR2703111B1 (fr) 1995-06-30
ITTO940219A1 (it) 1995-09-24
FR2703111A1 (fr) 1994-09-30
IT1273079B (it) 1997-07-04

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